JPH0533145B2 - - Google Patents
Info
- Publication number
- JPH0533145B2 JPH0533145B2 JP59229734A JP22973484A JPH0533145B2 JP H0533145 B2 JPH0533145 B2 JP H0533145B2 JP 59229734 A JP59229734 A JP 59229734A JP 22973484 A JP22973484 A JP 22973484A JP H0533145 B2 JPH0533145 B2 JP H0533145B2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- squeegee roller
- circumferential surface
- printing
- rotates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/40—Inking units
- B41F15/42—Inking units comprising squeegees or doctors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/025—Ducts formed between two rollers
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、印刷装置のインキ供給装置に係り、
特に輪転式孔版印刷装置のインキ供給装置に係
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an ink supply device for a printing device.
In particular, it relates to an ink supply device for a rotary stencil printing device.
従来の技術
輪転式孔版印刷装置に用いられるインキ供給装
置の一つとして、外周面にて円筒状版胴の内周面
に接触して配設され自身の中心軸線の周りに前記
円筒状版胴の回転に同期して回転するスクイージ
ローラと、前記スクイージローラの軸線に対し実
質的に平行に且前記スクイージローラの外周面と
の間に所定の一定間隙をおいて配設されたドクタ
ロツドとを有し、前記スクイージローラと前記ド
クタロツドとの間に形成された楔状空間部にイン
キ溜りを形成するよう構成され、前記インキ溜り
に供給された印刷インキを前記スクイージローラ
の回転に伴ない前記間隙を通過させつつ前記スク
イージローラの外周面に所定厚さの層状に付着せ
しめてこれを円筒状版胴の内周面へ移送するよう
作用するインキ供給装置が本願出願人と同一の出
願人による特願昭53−128043号（特開昭55−
55889号）に於て既に提案されている。BACKGROUND ART As one of the ink supply devices used in a rotary stencil printing machine, the ink supply device is disposed in contact with the inner circumferential surface of a cylindrical plate cylinder at its outer circumferential surface, and is arranged around its central axis. a squeegee roller that rotates in synchronization with the rotation of the squeegee roller; and a doctor rod that is disposed substantially parallel to the axis of the squeegee roller and with a predetermined constant gap between it and the outer peripheral surface of the squeegee roller. The ink reservoir is configured to form an ink reservoir in a wedge-shaped space formed between the squeegee roller and the doctor rod, and the printing ink supplied to the ink reservoir passes through the gap as the squeegee roller rotates. A patent application filed by the same applicant as the applicant of the present application discloses an ink supply device which acts to deposit a layer of a predetermined thickness on the outer circumferential surface of the squeegee roller and transfer it to the inner circumferential surface of a cylindrical plate cylinder. No. 53-128043 (Unexamined Japanese Patent Publication No. 1983-
55889) has already been proposed.
上述の如きインキ供給装置に於ては、スクイー
ジローラとドクタロツドとの間の間隙の大きさに
よりインキ溜りより円筒状版胴の内周面へのイン
キ供給量が決まり、これがインキ濃度を決定す
る。 In the ink supply device as described above, the amount of ink supplied from the ink reservoir to the inner peripheral surface of the cylindrical plate cylinder is determined by the size of the gap between the squeegee roller and the doctor rod, which determines the ink density.
発明が解決しようとする問題点
印刷インキの硬さが一定であるならば、前記間
隙が一定であることにより一定濃度の印刷物が得
られるが、印刷インキは、一般に、温度によつて
硬さを変化し、冬期の低温時には硬く、夏期の高
温時には軟らかくなり、このため前記間隙が一定
であると、低温時には印刷濃度が標準濃度より低
くなり、これとは反対に高温時には印刷濃度が標
準濃度より高くなる傾向がある。Problems to be Solved by the Invention If the hardness of the printing ink is constant, a constant gap can produce printed matter of a constant density. However, the hardness of the printing ink generally changes depending on the temperature. It becomes hard at low temperatures in winter and soft at high temperatures in summer. Therefore, if the gap is constant, the print density will be lower than the standard density at low temperatures, and conversely, the print density will be lower than the standard density at high temperatures. It tends to be higher.
また前記円筒状版胴の内周面に対するインキ供
給量が一定であつても、円筒状版胴の回転速度、
換言すれば印刷速度によつて印刷濃度が変化し、
高速印刷時には印刷濃度が標準濃度より低くな
り、低速印刷時には印刷濃度が標準濃度より高く
なる傾向がある。 Furthermore, even if the amount of ink supplied to the inner peripheral surface of the cylindrical plate cylinder is constant, the rotational speed of the cylindrical plate cylinder,
In other words, the print density changes depending on the printing speed,
During high-speed printing, the print density tends to be lower than the standard density, and during low-speed printing, the print density tends to be higher than the standard density.
本発明は、温度変化及び印刷速度に拘らず常に
一定濃度の印刷物が得られるようにする印刷装置
のインキ供給装置を提供することを目的としてお
り、特に特別な制御装置を必要とすることなくそ
の目的を達成するインキ供給装置を提供せんとす
るものである。 SUMMARY OF THE INVENTION The present invention aims to provide an ink supply device for a printing device that can always produce printed matter with a constant density regardless of temperature changes and printing speeds, and does not require any special control device. It is an object of the present invention to provide an ink supply device that achieves the objectives.
問題点を解決するための手段
上述の如き目的は、本発明によれば、円筒状外
周面にて版胴の円筒状内周面に接して配置され前
記版胴の回転に伴なつて自身の中心軸線の周りに
回転するスクイージローラと、前記スクイージロ
ーラの軸線に対し実質的に平行に延在し前記スク
イージローラの円筒状外周面との間に該スクイー
ジローラの回転に伴なうその円筒状外周面の移動
方向へ向けて間隙が漸次狭まるインキ通過空〓を
形成するドクタロツドとを有し、前記ドクタロツ
ドは前記スクイージローラの径方向に移動可能に
設けられていて、ばね手段により前記スクイージ
ローラの前記円筒状外周面に近付く方向に付勢さ
れており、前記スクイージローラの回転に伴なつ
てインキがその粘性により該スクイージローラの
円筒状外周面に引きずられて前記インキ通過空〓
内をその間〓が狭まる方向へ圧搾されつつ移動す
ることによりインキが前記ドクタロツドに及ぼす
力と前記ばね力の釣合いにより前記インキ通過空
〓の最小間〓の大きさが定まるよう構成されてい
る印刷装置のインキ供給装置によつて達成され
る。Means for Solving the Problems According to the present invention, the above-mentioned object is achieved by disposing the cylindrical outer circumferential surface in contact with the cylindrical inner circumferential surface of the plate cylinder, and causing the plate cylinder to rotate as the plate cylinder rotates. A squeegee roller that rotates around a central axis and a cylindrical outer circumferential surface of the squeegee roller that extends substantially parallel to the axis of the squeegee roller and the cylindrical shape of the squeegee roller rotates as the squeegee roller rotates. a doctor rod forming an ink passage space whose gap gradually narrows in the direction of movement of the outer circumferential surface; the doctor rod is provided so as to be movable in the radial direction of the squeegee roller; As the squeegee roller rotates, the ink is dragged along the cylindrical outer surface of the squeegee roller due to its viscosity, and the ink passes through the space.
A printing device configured such that the size of the minimum gap of the ink passage space is determined by the balance between the force exerted by the ink on the doctor rod and the spring force by moving the ink while being compressed in a direction in which the space becomes narrower. This is achieved by the ink supply device.
発明の作用及び効果
上述の如き構成によれば、スクイージローラと
ドクタロツドとの間隙は該間隙を通過しようとす
る印刷インキによりドクタロツドに与えられる力
と前記ばね手段により前記ドクタロツドに与えら
れるばね力との平衡関係により決まり、前記間隙
を通過しようとする印刷インキによりドクタロツ
ドに与えられる力は前記印刷インキが硬い時ほど
また通過速度が速い時ほどずり応力の如き応力が
増大することにより増大するから、印刷インキが
硬いほど、また前記通過速度が速い時ほど、換言
すれば印刷速度が速い時ほど前記間隙が大きくな
つて円筒状版胴の内周面に対するインキ供給量が
増大し、これとは反対に印刷インキが軟らかな時
ほど、また印刷速度が遅い時ほど前記間隙が小さ
くなつて前記円筒状版胴の内周面に対するインキ
供給量が減少する。これにより前記ばね手段が前
記ドクタロツドに与えるばね力が適宜に定められ
ていることにより印刷インキの硬度変化及び印刷
速度変化による印刷濃度の変化が前記間隙の変化
によつて補償され、これらの変化に拘らず常に一
定濃度の印刷物が得られるようになる。Operation and Effects of the Invention According to the configuration as described above, the gap between the squeegee roller and the doctor rod is created by the force applied to the doctor rod by the printing ink passing through the gap and the spring force applied to the doctor rod by the spring means. The force exerted on the doctor rod by the printing ink passing through the gap increases as the printing ink becomes harder and the passing speed increases due to the increase in stress such as shear stress. The harder the ink is, and the faster the passing speed is, in other words, the faster the printing speed is, the larger the gap becomes and the more ink is supplied to the inner peripheral surface of the cylindrical plate cylinder. The softer the printing ink is, or the slower the printing speed is, the smaller the gap becomes, and the amount of ink supplied to the inner peripheral surface of the cylindrical plate cylinder decreases. As a result, the spring force applied by the spring means to the doctor rod is appropriately determined, so that changes in print density due to changes in printing ink hardness and changes in printing speed are compensated for by changes in the gap. Prints with a constant density can be obtained regardless of the situation.
実施例
以下に添付の図を参照して本発明を実施例につ
いて詳細に説明する。EXAMPLES The present invention will now be described in detail by way of examples with reference to the accompanying drawings.
第１図乃至第３図は本発明による印刷装置のイ
ンキ供給装置の一つの実施例を示している。これ
らの図に於て、１は枠体を示しており、該枠体は
互いに平行に設けられた一対の側板２及び３を備
えており、図示されていない印刷装置の機枠より
固定支持されている。 1 to 3 show one embodiment of an ink supply device for a printing apparatus according to the present invention. In these figures, reference numeral 1 indicates a frame body, and the frame body is provided with a pair of side plates 2 and 3 provided parallel to each other, and is fixedly supported by the machine frame of a printing device (not shown). ing.
側板２と３との間にはスクイージローラ４とド
クタロツド６とが互いに平行に配設されている。
スクイージローラ４は、その両端部に設けられた
軸部５にて枠体１に形成された丸孔１０に係合し
て枠体１より自身の中心軸線の周りに回転可能に
支持され、外周面にて円筒状版胴Ｄの内周面に摺
接している。スクイージローラ４の一方の軸部５
にはスプロケツト８が取付けられており、該スプ
ロケツトには無端伝動ベルトが係合している。無
端伝動ベルト９は、スクイージローラ４を円筒状
版胴Ｄの回転方向と同方向に、即ち図にて反時計
廻り方向に円筒状版胴Ｄの回転に同期して回転駆
動するようになつている。 A squeegee roller 4 and a doctor rod 6 are arranged parallel to each other between the side plates 2 and 3.
The squeegee roller 4 is rotatably supported by the frame 1 around its own central axis by engaging a round hole 10 formed in the frame 1 with shaft portions 5 provided at both ends thereof, and is rotatably supported by the frame 1 around its own central axis. The surface is in sliding contact with the inner peripheral surface of the cylindrical plate cylinder D. One shaft portion 5 of the squeegee roller 4
A sprocket 8 is attached to the sprocket, and an endless transmission belt is engaged with the sprocket. The endless transmission belt 9 rotates the squeegee roller 4 in the same direction as the rotation direction of the cylindrical plate cylinder D, that is, counterclockwise in the figure, in synchronization with the rotation of the cylindrical plate cylinder D. There is.
ドクタロツド６は、その両端部に設けられた軸
部７にて枠体１に形成されたスクイージローラ４
の径方向に延在する長孔１１に係合し、スクイー
ジローラ４に対しその径方向に移動可能に設けら
れている。 The doctor rod 6 has shaft portions 7 provided at both ends thereof, and a squeegee roller 4 formed on the frame 1.
It is engaged with a long hole 11 extending in the radial direction of the squeegee roller 4 and is movable in the radial direction of the squeegee roller 4 .
スクイージローラ４の軸部５には各々ブロツク
１２が軸部５に対し回転可能に取付けられてお
り、またドクタロツド６の軸部７には各々ブロツ
ク１３が軸部７に対し回転可能に取付けられてい
る。ブロツク１３には各々ロツド１４がその軸線
方向に貫通して設けられており、該ロツドは各々
一端にてブロツク１２にねじ止め固定されてい
る。ロツド１４の各々の他端部にはばねリテーナ
１５が取付位置調整可能にねじ止めされており、
このばねリテーナ１５とブロツク１３との間に
各々圧縮コイルばね１６が取付けられている。圧
縮コイルばね１６は各々ドクタロツド６をスクイ
ージローラ４の外周面に近付く方向へ付勢してい
る。この圧縮コイルばね１６の予荷重はばねリテ
ーナ１５のロツド１４に対する取付位置の調整に
より調節される。 A block 12 is attached to each shaft portion 5 of the squeegee roller 4 so as to be rotatable with respect to the shaft portion 5, and a block 13 is respectively attached to the shaft portion 7 of the doctor rod 6 so as to be rotatable relative to the shaft portion 7. There is. Each block 13 has a rod 14 extending axially through it, each of which is screwed to block 12 at one end. A spring retainer 15 is screwed to the other end of each rod 14 so that its mounting position can be adjusted.
A compression coil spring 16 is installed between the spring retainer 15 and the block 13, respectively. The compression coil springs 16 each bias the doctor rod 6 in a direction toward the outer peripheral surface of the squeegee roller 4. The preload of the compression coil spring 16 is adjusted by adjusting the mounting position of the spring retainer 15 with respect to the rod 14.
上述の如き構成よりなるインキ供給装置に於て
は、インキ供給パイプ１７よりスクイージローラ
４上に印刷インキが流出供給される。この印刷イ
ンキはスクイージローラ４の回転に伴なつてスク
イージローラ４とドクタロツド６との間の楔状空
間部に形成されているインキ溜りＰに巻込まれて
流動性インキ塊を形成する。インキ溜りＰの流動
性インキ塊はスクイージローラ４の回転に伴ない
ドクタロツド６を圧縮コイルばね１６のばね力に
抗してスクイージローラ４より引離してその両者
間にできる間隙２０を通過してスクイージローラ
４の外周面に前記間隙の大きさにより決まる厚さ
の層状に付着して円筒状版胴Ｄな内周面へ送られ
る。 In the ink supply device configured as described above, printing ink flows out and is supplied onto the squeegee roller 4 from the ink supply pipe 17. As the squeegee roller 4 rotates, this printing ink is drawn into an ink reservoir P formed in a wedge-shaped space between the squeegee roller 4 and the doctor rod 6 to form a fluid ink lump. As the squeegee roller 4 rotates, the fluid ink lump in the ink reservoir P pulls the doctor rod 6 away from the squeegee roller 4 against the spring force of the compression coil spring 16, passes through the gap 20 created between the two, and is squeegeeed. It adheres to the outer peripheral surface of the roller 4 in a layer having a thickness determined by the size of the gap and is sent to the inner peripheral surface of the cylindrical plate cylinder D.
このときのスクイージローラ４とドクタロツド
６との間隙２０は、該間隙を通過しようとする印
刷インキによりドクタロツド６に与えられる力と
圧縮コイルばね１６によりドクタロツド６に与え
られるばね力との平衡関係により決まり、間隙２
０を通過しようとする印刷インキによりドクタロ
ツド６に与えられる力が大きい時ほど増大し、こ
れに応じて円筒状版胴Ｄの内周面に対するインキ
供給量が増大する。間隙２０を通過しようとする
印刷インキによりドクタロツド６に与えられる力
は、前記印刷インキが硬い時ほど、また通過速度
が速い時ほどずり応力の如き応力が増大すること
によつて増大するから、印刷インキが硬い時ほ
ど、或いは前記通過速度が速い時ほど、即ち印刷
速度が速い時ほど、第１図に示されている如く、
間隙２０が増大し、これとは反対に印刷インキが
軟らかい時ほど、また印刷速度が遅い時ほど、第
２図に示されている如く、間隙２０が小さくな
る。 The gap 20 between the squeegee roller 4 and the doctor rod 6 at this time is determined by the equilibrium relationship between the force applied to the doctor rod 6 by the printing ink trying to pass through the gap and the spring force applied to the doctor rod 6 by the compression coil spring 16. , gap 2
The larger the force applied to the doctor rod 6 by the printing ink passing through the zero point, the greater the force, and the amount of ink supplied to the inner peripheral surface of the cylindrical plate cylinder D increases accordingly. The force exerted on the doctor rod 6 by the printing ink passing through the gap 20 increases as the printing ink becomes harder and as the passing speed increases, as stress such as shear stress increases. As shown in FIG. 1, the harder the ink is, or the faster the passing speed is, the faster the printing speed is.
The gap 20 increases, and conversely, the softer the printing ink or the slower the printing speed, the smaller the gap 20 becomes, as shown in FIG.
上述の如く間隙が印刷インキの硬さ及び印刷速
度に応じて変化することにより印刷インキの硬度
の変化及び印刷速度の変化による印刷濃度の変化
が補償され、これらの変化に拘わず常に一定濃度
の印刷物が得られるようになる。 As mentioned above, by changing the gap according to the hardness of the printing ink and the printing speed, changes in printing density due to changes in the hardness of the printing ink and changes in the printing speed are compensated for, and the density is always constant regardless of these changes. You will be able to obtain printed matter.
以上に於ては、本発明を特定の実施例について
詳細に説明したが、本発明は、これに限定される
ものではなく、本発明の範囲内にて種々の実施例
が可能であることは当業者にとつて明らかであろ
う。 Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto, and various embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art.
第１図は本発明による印刷装置のインキ供給装
置の一つの実施例をその間隙が大きい時の状態に
ついて示す正面図、第２図は第１図に示された本
発明よる印刷装置のインキ供給装置の間隙が小さ
い時の状態について示す正面図、第３図は第１図
及び第２図に示された本発明によるインキ供給装
置の概略斜視図である。
１……枠体、２，３……側板、４……スクイー
ジローラ、５……軸部、６……ドクタロツド、７
……軸部、８……スプロケツト、９……無端伝動
ベルト、１０……丸孔、１１……長孔、１２，１
３……ブロツク、１４……ロツド、１５……ばね
リテーナ、１６……圧縮コイルばね、１７……イ
ンキ供給パイプ、２０……間隙、Ｄ……円筒状版
胴。
FIG. 1 is a front view showing one embodiment of an ink supply device for a printing device according to the present invention in a state when the gap is large, and FIG. 2 is a front view showing an ink supply device for a printing device according to the present invention shown in FIG. FIG. 3 is a front view showing a state when the gap of the device is small, and FIG. 3 is a schematic perspective view of the ink supply device according to the present invention shown in FIGS. 1 and 2. 1... Frame body, 2, 3... Side plate, 4... Squeegee roller, 5... Shaft portion, 6... Doctor rod, 7
...Shaft part, 8 ... Sprocket, 9 ... Endless transmission belt, 10 ... Round hole, 11 ... Long hole, 12,1
3...Block, 14...Rod, 15...Spring retainer, 16...Compression coil spring, 17...Ink supply pipe, 20...Gap, D...Cylindrical plate cylinder.
Claims (1)
て配置され前記版胴の回転に伴なつて自身の中心
軸線の周りに回転するスクイージローラと、前記
スクイージローラの軸線に対し実質的に平行に延
在し前記スクイージローラの円筒状外周面との間
に該スクイージローラの回転に伴なうその円筒状
外周面の移動方向へ向けて間〓が漸次狭まるイン
キ通過空〓を形成するドクタロツドとを有し、前
記ドクタロツドは前記スクイージローラの径方向
に移動可能に設けられていて、ばね手段により前
記スクイージローラの前記円筒状外周面に近付く
方向に付勢されており、前記スクイージローラの
回転に伴なつてインキがその粘性により該スクイ
ージローラの円筒状外周面に引きずられて前記イ
ンキ通過空〓内をその間〓が狭まる方向へ圧搾さ
れつつ移動することによりインキが前記ドクタロ
ツドに及ぼす力と前記ばね力の釣合いにより前記
インキ通過空〓の最小間〓の大きさが定まるよう
構成されている印刷装置のインキ供給装置。1. A squeegee roller that is arranged with its cylindrical outer circumferential surface in contact with the cylindrical inner circumferential surface of the plate cylinder and rotates around its own central axis as the plate cylinder rotates, and An ink passage space is formed between the squeegee roller and the cylindrical outer circumferential surface of the squeegee roller, and the space gradually narrows in the direction of movement of the cylindrical outer circumferential surface as the squeegee roller rotates. The doctor rod is provided to be movable in the radial direction of the squeegee roller, and is biased by spring means in a direction approaching the cylindrical outer peripheral surface of the squeegee roller. As the ink rotates, the ink is dragged by the cylindrical outer circumferential surface of the squeegee roller due to its viscosity and moves within the ink passage space while being compressed in a direction in which the space becomes narrower, resulting in the force exerted by the ink on the doctor rod. An ink supply device for a printing apparatus, wherein the minimum distance of the ink passage space is determined by the balance between the spring force and the spring force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22973484A JPS61108557A (en) | 1984-10-31 | 1984-10-31 | Ink supplying apparatus for printing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22973484A JPS61108557A (en) | 1984-10-31 | 1984-10-31 | Ink supplying apparatus for printing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61108557A JPS61108557A (en) | 1986-05-27 |
| JPH0533145B2 true JPH0533145B2 (en) | 1993-05-18 |
Family
ID=16896848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22973484A Granted JPS61108557A (en) | 1984-10-31 | 1984-10-31 | Ink supplying apparatus for printing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61108557A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000118118A (en) * | 1998-10-12 | 2000-04-25 | Riso Kagaku Corp | Stencil printer |
| CN103978781A (en) * | 2014-05-09 | 2014-08-13 | 新乡市新机创新机械有限公司 | Ink fountain flip balancing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50146409A (en) * | 1974-04-24 | 1975-11-25 | ||
| JPS5555889A (en) * | 1978-10-18 | 1980-04-24 | Riso Kagaku Corp | Stencil printing device |
| JPS5664893A (en) * | 1979-10-31 | 1981-06-02 | Riso Kagaku Corp | Printer |
-
1984
- 1984-10-31 JP JP22973484A patent/JPS61108557A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50146409A (en) * | 1974-04-24 | 1975-11-25 | ||
| JPS5555889A (en) * | 1978-10-18 | 1980-04-24 | Riso Kagaku Corp | Stencil printing device |
| JPS5664893A (en) * | 1979-10-31 | 1981-06-02 | Riso Kagaku Corp | Printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61108557A (en) | 1986-05-27 |
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